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Finding the Fourth Proportional to 79,138.27, 109,213.57 and 43,328.57

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Solution

The fourth proportional to 79,138.27, 109,213.57 and 43,328.57 is: 59,794.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,138.27 : 109,213.57 = 43,328.57 : x
  2. Step 2: Convert to fraction form
    79,138.27/109,213.57 = 43,328.57/x
  3. Step 3: Cross multiply
    79,138.27x = 109,213.57 × 43,328.57
  4. Step 4: Simplify right side
    79,138.27x = 4,732,067,691.39
  5. Step 5: Solve for x
    x = 4,732,067,691.39/79,138.27
  6. Step 6: Final answer
    x = 59,794.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.